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Markdown Editor

Write Markdown Instantly

Write Markdown and see the live preview. Export to HTML or download your .md file.

✏️ Editor
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👁️ Preview
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What is Markdown?

Markdown is a free Markdown editor with a live side-by-side preview. It supports GitHub Flavored Markdown including tables, task lists, and fenced code blocks with syntax highlighting. Export your work as styled HTML or download the raw .md file — everything stays in your browser.

Markdown is the de facto format for documentation, README files, release notes, and personal notes, but most editors either require an app install or render your text on a remote server. Markdown gives you a distraction-free writing environment with live preview, GFM support (tables, task lists, and syntax-highlighted code blocks), and one-click export to styled HTML or plain .md. Everything is rendered locally with the 'marked' library, so you can safely draft internal documentation or private notes without sending a single character to a server.

How to Use Markdown

  1. Start typing — Write Markdown in the left editor pane and watch the preview render on the right.
  2. Use the toolbar — Select text and click Bold, Italic, Link, Code, Blockquote, List, or Heading buttons to wrap it in syntax.
  3. Refine your document — Tables, task lists, and code blocks render instantly with GFM support.
  4. Export or download — Click Export HTML for a styled document or Download .md for the raw source.

Key Features

Frequently Asked Questions

Markdown supports standard Markdown plus GitHub Flavored Markdown (GFM) extensions including tables, task lists, strikethrough, fenced code blocks with syntax highlighting, and auto-linking URLs.

Yes! Click the 'Export HTML' button to download your rendered Markdown as a complete, styled HTML document. You can also use 'Download .md' to save the raw Markdown source file.

No. Markdown renders Markdown entirely in your browser using the 'marked' library. Nothing you type is ever sent to any server. This makes it safe for writing sensitive documentation or notes.

Markdown provides a large split-pane editor with resizable panels. You can also use your browser's native fullscreen mode (F11) for an immersive writing experience.

The toolbar provides quick-access buttons for common Markdown formatting: bold, italic, links, code blocks, blockquotes, lists, and headings.

✅ Done!
'; var blob = new Blob([fullHTML], { type: 'text/html' }); var url = URL.createObjectURL(blob); var a = document.createElement('a'); a.href = url; a.download = 'export.html'; a.click(); URL.revokeObjectURL(url); showToast('✅ HTML exported'); } function clearEditor() { if (document.getElementById('markdownInput').value && !confirm('Clear the editor?')) return; document.getElementById('markdownInput').value = ''; renderPreview(); } function showToast(msg) { var t = document.getElementById('toast'); t.textContent = msg; t.classList.add('show'); setTimeout(function() { t.classList.remove('show'); }, 2000); } // ---- Init ---- document.addEventListener('DOMContentLoaded', function() { var input = document.getElementById('markdownInput'); // Debounced render input.addEventListener('input', function() { clearTimeout(renderTimeout); renderTimeout = setTimeout(renderPreview, 150); }); // Tab key support in textarea input.addEventListener('keydown', function(e) { if (e.key === 'Tab') { e.preventDefault(); var start = this.selectionStart; var end = this.selectionEnd; this.value = this.value.substring(0, start) + ' ' + this.value.substring(end); this.selectionStart = this.selectionEnd = start + 2; renderPreview(); } }); // Load marked window._ensureCDN(['https://cdnjs.cloudflare.com/ajax/libs/marked/15.0.4/marked.min.js']).then(function() { if (typeof marked !== 'undefined') { markedLoaded = true; renderPreview(); } else { document.getElementById('preview').innerHTML = '

⚠️ Failed to load Markdown renderer

'; } }); });